Physics
Scientific paper
Nov 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jimo...29..156m&link_type=abstract
WGN, Journal of the International Meteor Organization, vol. 29, no. 5, p. 156-164
Physics
22
Scientific paper
On 2001 November 18th UT, the Earth will have close encounters with trails of meteoroids and dust generated over the past few centuries by Comet 55P/Tempel-Tuttle. It has previously been shown that these trail encounters will produce spectacular meteor displays, observed at east Asian longitudes and in North America having the chance to see this year's Leonid activity peaks in a moonless sky. Work by Lyytinen et al. has discussed the relevance of dispersive radiative effects in trail aging. In this article, we find that combining our existing ZHR model with an empirical aging parameter still leads to expected rates of several thousand from the east Asian trail encounters. We also consider what may be learned from high-resolution observations of radiants during such outbursts, of particular interest in 2001 because of meteor activity expected simultaneously from more than one trail. The Leonid radiant structure is shown to contain radiants from each dust trail separated by several arc minutes, and moreover each dust trail radiant contains its own interval structure which relates to the Comet's activity during the perihelion passage when the trail was generated.
Asher David J.
McNaught Robert H.
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